PDF of 125 KB for the 2SC5317FT, an NPN bipolar transistor code in JIS style with an FT suffix that the name leaves unexplained. Catalogued as a schematic, it is most plausibly a datasheet. Such sheets give limits, characteristics and the mechanical package. Since suffixes may indicate a different case or lead form, compare it with the plain 2SC5317 document and with the fitted part. Confirm pinout before soldering in any replacement to avoid reversed leads.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
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